Liam Neeson is not exclusively dating Polish actress Kasia Wolejnio, sources said, although she was spotted out with him this week at the screening of “The Next Three Days” and taking in “The Merchant of Venice” on Broadway. “I wouldn’t put them together as a couple at all,” said our source close to Neeson. The star, who was heartbroken when his wife, Natasha Richardson, died last year, arrived separately from Wolejnio at the “Days” premiere, then dined with his publicist and went home alone. But sources close to Wolejnio claim they’re old friends and have been dating for about eight months. On Thursday, they left “Venice” together and were spotted being “affectionate and openly cuddling” at dinner at Serafina afterward. “Liam doesn’t have someone he’s dating on a regular basis. There’s nothing serious going on here. I hope he remembers her last name,” said a source. Reps for Wolejnio and Neeson had no comment.